Timeline of terror: 12 years of atrocities
July 7, 2005: Four suicide bombers kill 52 and injure hundreds of others in blasts on the London Underground network and a bus. Twenty six die in the bombing at Russell Square on the Piccadilly line, six in the bombing at Edgware Road on the Circle line, seven in the bombing at Aldgate on the Circle line, and 13 in the bombing on a bus at Tavistock Square.
June 30, 2007 Two men inspired by Islamist extremism ram a 4x4 laden with petrol and propane tanks into the main terminal of Glasgow Airport. One of the attackers died in the incident and five people were injured.
May 22, 2013 Fusilier Lee Rigby (25) is murdered by Islamic extremists Michael Adebolajo and Michael Adebowale. The serviceman was walking near his barracks in Woolwich, south-east London, when the pair rammed him with a car before attempting to hack off his head with knives. The killers were jailed for life at the Old Bailey in February 2014.
December 5, 2015 A lone attacker attempts to behead a passenger during an Isil-inspired rampage in the ticket hall of Leytonstone Underground station in east London. Somali-born Muhiddin Mire targeted strangers at random during the attack, before slashing fellow passenger Lyle Zimmerman (56) with a knife. The schizophrenic was sent to Broadmoor Hospital after being given a life sentence with a minimum term of eight years for attempted murder.
June 16, 2016 Labour MP Jo Cox is murdered outside her constituency office in Batley, West Yorkshire. The mother of two (41) was shot and stabbed multiple times by right-wing extremist Thomas Mair. He was later handed a whole-life prison sentence for her murder.
March 22, 2017 Five people are killed when an Islamist extremist launches a car and knife attack in London. Khalid Masood drove a hired car over Westminster Bridge, near the Houses of Parliament, mounted the pavement and hit pedestrians, before crashing into railings outside the Palace of Westminster. He stabbed PC Keith Palmer (48) to death and also killed US tourist Kurt Cochran, Romanian tourist Andrea Cristea (31) and Britons Aysha Frade (44) and 75-year-old Leslie Rhodes. Masood was shot dead by police.
May 22, 2017 Twenty two people - including children - are killed and around 116 injured during a terrorist bombing at a pop concert in Manchester. Lone suicide bomber Salman Abedi detonated an improvised explosive device as crowds of music fans, many of them youngsters, left the Manchester Arena following a performance by US artist Ariana Grande.